There was actually a few hints but they were incredibly well covered so we over looked them. But I went back and watched every scene that Pamela Rose was in. One thing I noticed is that other than the very first time we meet her at the bar, she never changed her outfit. She pretty much had on the same exact suit.
The second hint is that nearly every time he saw her they were usually by themselves. The only exceptions being the first time we meet her and the scene at the restaurant. But again, both of these were so well done that we would have never really suspected anything like her being an hallucination. The writers did such a great job of setting us up to think she was a Dubois member that we weren't thinking about the subtle hints we were missing.
Either way, this was a very well written episode. Probably the best episode of the entire series in my opinion. Looking forward to seeing more stunners like this.
